化工学报2011，Vol.62Issue(11)：3024-3029,6.DOI:10.3969/j.issn.0438-1157.2011.11.007
分形多孔介质的孔隙特性对气体扩散的影响
Effects of pore characteristics of fractal porous media on gas diffusion
摘要
Abstract
Porous particles used in combustion or catalysis were made by random walk method. The fractal characteristics of the porous particles are close to that of real ones. Based on the particle model> gas diffusion was investigated in the porous particles. Diffusion control equations were established according to the kinetic theory of gases and statistical thermodynamics. The effect of pore characteristics on gas diffusion was analyzed. The relationships between the specific area, average pore diameter and porosity with the diffusion coefficient were obtained. The results indicate that the gas diffusion coefficient decreases with the increase of specific area of pores. Gas diffusion coefficient increases as a power function of average pore diameter, and the exponent that represents the sensibility decreases linearly with the increase of porosity.关键词
分形/多孔介质/扩散/孔隙特性Key words
fractal/porous media/diffusion/pore characteristic分类
数理科学引用本文复制引用
陈永利,曹立勇,何威,何榕..分形多孔介质的孔隙特性对气体扩散的影响[J].化工学报,2011,62(11):3024-3029,6.基金项目
国家重点基础研究发展计划项目(2006CB200305) （2006CB200305）
国家自然科学基金项目(50976055). （50976055）
